Hemingray No. 12 Glass Insulator Value Guide

The Hemingray No. 12 is a quintessential piece of American utility history, serving as a vital component in the expansion of early telegraph and telephone networks. Produced by the prolific Hemingray Glass Company, these aqua-colored artifacts are prized by collectors for their distinct 1893 patent date and robust industrial design.

What Is Hemingray No. 12 Glass Insulator Worth?

The typical price range for Hemingray No. 12 Glass Insulator is $10 - $20 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Physical condition is paramount, with chips or 'flea bites' on the sharp drip points significantly reducing the $10-$20 market value.
• The clarity and depth of the aqua color can influence desirability among glass enthusiasts.
• The legibility and crispness of the embossed patent date and company name affect the item's display quality.
• Presence of original manufacturing bubbles or unique glass swirls can sometimes add a small premium for specialized collectors.

How to Identify Hemingray No. 12 Glass Insulator?

• Look for the embossed text 'HEMINGRAY No. 12' clearly visible on the front of the glass skirt.
• Verify the 'PATENT MAY 2 1893' marking which is characteristic of this specific production era.
• Check for the standard aqua glass color and the presence of drip points along the bottom base edge.
• Confirm the internal threading is intact, as these were designed to screw onto wooden side brackets or crossarm pins.

History of Hemingray No. 12 Glass Insulator

Glass insulators were crucial for early telegraph and telephone lines, providing electrical insulation between the live wires and the wooden poles. Hemingray Glass Company, established in 1848, became one of the largest manufacturers of these insulators, producing millions over several decades. Collectors prize these historical artifacts for their varied colors, designs, and the embossed company and patent information, each telling a story of America's burgeoning electrical infrastructure.